Kelsey Grammer and Kayte Walsh, who were married last February in New York City, previously had a miscarriage in 2010.

[Kayte is] extraordinary,” Grammer says. “She’s one of the most loving, amazing, warm human beings I’ve ever met. She’s funny and serious all at the same time. She’s an amazing person and I think she’ll blow [the kids] away.”

This will be the fifth child for Kelsey Grammer. The Frasier alum is dad to son Jude, 7, and daughters Mason, 10, with ex Camille Grammer, Greer, 19, with Barrie Buckner, and Spencer, 28, with Doreen Alderman.

“Fatherhood’s always different, based upon the character that comes into your life,” Kelsey Grammer has said. “They arrive and tell you what you have to do.”

Kelsey Grammer and Camille Grammer are currently undergoing a bitter custody battle following their 2011 divorce. A source close to both stars said that Camille Grammer was unaware Kelsey Grammer was expecting another child.

“Camille and the children had no idea,” says the source. “They found out about it from the media.”